Leroy-Somer LSE Series Instruction Manual

2012.03 / d
This manual is to be given to
the end user
(Addition to specic manual ref. 3606,
included with the motor)
LSE - FLSE
Three-phase induction motors
for atmospheres containing explosive gases and dust
General manual: Installation and maintenance
II 2 G
Ex e IIC T3 (or T4) Gb
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IMPORTANT
These symbols appear in this document whenever it is important to take special precautions during installation, operation,
maintenance or servicing of the motors.
It is essential that electric motors are installed by qualied, experienced and authorised personnel.
In accordance with the main requirements of the EC Directives, the safety of people, animals and property should be ensured when
tting the motors into machines.
Particular attention must be given to equipotential ground or earthing connections.
The noise level of the machines, measured under standard conditions, conforms to the requirements of the standard and does not
exceed the maximum value of 85 dB(A) pressure at 1 metre.
The following preliminary precautions must be taken before working on any stationary device:
• Mains voltage disconnected and no residual voltage present
• Careful examination of the causes of the stoppage (blocked transmission - loss of phase - cut-out due to
thermal protection - lack of lubrication, etc)
Electric motors are industrial products. They must therefore be installed by qualied, experienced and authorised
personnel. The safety of people, animals and property must be ensured when tting the motors into machines (please refer
to current standards).
Those persons required to work on electrical installations and equipment in zones where there is a risk of explosion must be specially
trained and authorised for this type of equipment.
They must be familiar with not only the electrical risks, but also with those that are due to the chemical properties and physical
characteristics of the products used in the installation (gas, vapour, dust), as well as the environment in which the equipment
operates. These elements determine the risk of re and explosion.
In particular, they must be informed and aware of the reasons for the specic safety instructions in order to comply with them. For
example:
- Do not open when powered up
- Do not open when powered up in atmospheres containing explosive gas or dust
- Do not repair while powered up
- Do not move when on load
- Wait for a few minutes before opening
- Replace the seals tightly to ensure watertightness
Before commissioning, ensure compatibility of the information on the motor nameplate with the actual explosive
atmosphere and the operating zone.
NOTE:
LEROY-SOMER reserves the right to modify the characteristics of its products at any time in order to incorporate the latest
technological developments. The information contained in this document may therefore be changed without notice.
Copyright 2004: LEROY-SOMER
This document is the property of LEROY-SOMER.
It may not be reproduced in any form without prior authorisation.
All brands and models have been registered and patents applied for.

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Dear Customer,
You have just acquired a LEROY-SOMER safety motor.
This motor benets from the experience of one of the largest manufacturers in the world, using state-of-the-art technology in
automation, specially selected materials and rigorous quality control. As a result, the regulatory authorities have awarded our motor
factories the ISO 9001 - Edition 2008 international certicate.
We thank you for making this choice, and would ask you to read the contents of this manual.
By observing a few essential rules, you will ensure problem-free operation for many years.
LEROY-SOMER
EC Declaration of conformity
Included with the manual “Specic recommendations: Installation and Maintenance” (ref. 3606) is supplied with the relevant products.
We, MOTEURS LEROY SOMER,
declare, under our sole responsibility, that the following products :
LSE and FLSE series type "e" increased safety induction motors
bearing the following markings on their nameplates:
CE 0080 II 2G Ex e IIC T3 (ou T4) Gb (zone 1)
or CE 0080 II 2GD Ex e IIC T3 (ou T4) Gb Ex tb IIIC T125°C Db (zone 1 and 21)
IIC motors can be marqued IIA or IIB for commercial reasons.
Comply with :
 European and international standards : IEC60079-0:2007 ; EN60079-0:2009
IEC60079-7:2006 ; EN60079-7:2007
IEC60079-31:2008 ; EN60079-31:2009 (moteurs Ex tb)
IEC-EN60034 ; IEC-EN60072 ; IEC-EN60529
• The Low Voltage Directive: 2006/95/CE
• The ATEX European Directive: 94/9/EC (decree 96 1010 from 19/10/1996)
• The type awarded an EC type-examination certificate INERIS 01ATEX0010 X
By the notified body:
INERIS (0080) – BP 2 – Parc technologique ALATA
60550 – VERNEUIL EN HALATTE
The design and manufacturing requirements are covered Under the responsibility of the notified body :
by the PRODUCT QUALITY ASSURANCE notifications INERIS
This conformity permits the use of these ranges of products in machines subject to the application of the Machinery Directive
2006/42/EC, provided that they are integrated or incorporated and/or assembled in accordance with, amongst others, the
regulations of standard EN 60204 "Electrical Equipment for Machinery" and the Electromagnetic Compatibility Directive
2004/108/EC.
The products defined above may not be put into service until the machines in which they are incorporated have been declared
as complying with the applicable Directive.
Installation of these motors must comply with the regulations, decrees, laws, orders, directives, application circulars, standards,
rules or any other document relating to the installation site. LEROY-SOMER accepts no liability in the event of failure to
comply with these rules and regulations.
Note: When the motors are supplied via appropriate separate electronic inverters and/or controlled by electronic control or
monitoring devices, they must be installed by a professional who will be responsible for ensuring that the electromagnetic
compatibility regulations of the country in which the product is installed are observed.
Signature of quality director : Signature of technical director :
P. THERY C.PLASSE
Q1T135 F from 15/11/2011
EC DECLARATION OF CONFORMITY AND
INCORPORATION
(
F
F)
LS
LS
.
.
E
E motor

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CONTENTS
1 - RECEIPT ........................................................................ 5
1.1 - Identication and marking ...................................... 5
2 - STORAGE ...................................................................... 6
3 - COMMISSIONING .......................................................... 6
4 - INSTALLATION .............................................................. 7
4.1 - Position of lifting rings ............................................. 7
4.2 - Location - Ventilation ........................................... 7-8
4.3 - Coupling ................................................................. 8
5 - ELECTRICAL PARAMETERS -
LIMIT VALUES .................................................................... 9
5.1 - Limiting problems caused by motor starting ........... 9
5.2 - Supply voltage ........................................................ 9
5.3 - Starting time ........................................................... 9
5.4 - Locked rotor time TE ............................................... 9
5.5 - Supply by frequency inverter .................................. 9
6 - USE .............................................................................. 10
7 - SPECIAL OPERATING CONDITIONS ......................... 11
7.1 - Use with a variable speed drive ............................ 12
8 - MECHANICAL ADJUSTMENTS ............................. 13-14
9 - SUPPLY CONNECTION ............................................... 15
9.1 - Terminal box ........................................................ 15
9.2 - Wiring diagram for terminal blocks
or isolators .......................................................... 16
9.3 - Direction of rotation .............................................. 16
9.4 - Earth terminal ....................................................... 16
9.5 - Connecting the cables .......................................... 17
10 - MAINTENANCE ......................................................... 18
10.1 - General information ............................................ 18
10.2 - Corrective maintenance: general information 19-20
10.3 - Safety regulations .............................................. 20
10.4 - Routine maintenance .................................... 20-21
10.5 - Reconditioning the bearings ............................... 21
10.6 - IP 55 or IP 65 protection for the motor ................. 21
10.7 - Troubleshooting guide ........................................ 22
10.8 - Preventive maintenance .................................... 22
11 - DISMANTLING AND REASSEMBLY
PROCEDURES .......................................................... 24
11.1 - LSE 80 to LSE 160 MP/LR motors ................. 24-25
11.2 - LSE 160 M/L, LSE 180 MT/LR motors ........... 26-27
11.3 - LSE 180 L, LSE 200
LSE 225 ST/MT/MR, LSE 250 MZ motors ....... 28-29
11.4 - LSE 250 ME, LSE 280 SC/MC motors ........... 30-31
INDEX
Adjustments....................................................................... 13
Alarms - early warning ....................................................... 10
Balancing...................................................................... 8 - 22
Belts...................................................................... 11 - 14 - 20
Cables ................................................................ 12 - 15 to 18
Cable gland................................................................. 15 - 18
Capacitors ......................................................................... 20
Connection .......................................................... 16 - 17 - 22
Connection diagrams ......................................................... 17
Coupling ................................................... 8 - 11 - 13 - 20 - 22
Coupling sleeves .................................................... 8 - 11 - 13
Digistart ............................................................................. 11
Direction of rotation ................................................ 7 - 16 - 22
Draining condensation water ............................................. 20
Earth ................................................................ 2 - 11 - 16 - 17
Earth terminal .................................................................... 16
EC declaration of Conformity ............................................... 3
End shields .................................................. 10 to 14 - 19 - 20
European directives ........................................................ 2 - 5
Frequency inverter ........................................................ 9 - 12
Greasing - Grease nipples ............................... 6 - 8 - 20 to 21
Identication ........................................................................ 5
Inertia ywheel ................................................................... 13
“Installation and Maintenance” manual................................ 3
Insulation ...................................................................... 6 - 19
Lifting ring .............................................................. 7 - 25 - 29
Location ........................................................................ 7 - 15
Materials handling......................................................... 7 - 16
Mains connection ...................................................... 15 to 18
Marking ........................................................................... 5 - 6
Mounting ............................. 8 - 10 - 13 to 15 - 19 - 20 - 22 - 24
Nameplate ................ 2 - 5 - 6 - 8 - 9 to 12 - 14 to 18 - 20 to 22
Power supply ....................... 5 - 9 to 12 - 16 - 17 - 19 - 20 - 22
Protection ................................ 2 - 5 to 12 - 14 to 18 - 20 to 22
Pulleys .................................................................... 8 - 11 - 14
Receipt ................................................................................ 5
Routine maintenance .................................................. 18 - 20
Space heaters..................................................... 10 to 12 - 20
Spare parts ........................................................................ 18
Startup ............................................................. 9 - 11 - 13 - 22
Storage .......................................................................... 6 - 11
Thermal protections ..............................................10 - 11 - 14
Terrminal box ................................ 6 to 8 - 11 12 - 15 - 17 - 20
Terminal box: tightening the screws ............................ 16 - 17
Tolerances ......................................................................... 13
Troubleshooting ................................................................ 22
Ventilation ............................................ 7 - 8 - 12 - 18 - 22 - 24
Variable speed ................................................................... 12

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1 - RECEIPT
On receipt of your motor, check that it has not suffered any damage in transit.
If there are obvious signs of knocks, contact the carrier (you may able to claim on their insurance) and after a visual check,
turn the motor by hand to detect any malfunction.
1.1 - Identication and marking
As soon as you receive the motor, check that the nameplate on the machine conforms to your order.
Denition of symbols used on nameplates:
ATEX specic marking
: Specic marking for protection against risks of explosion
II 2G or II 2GD : Group and category of equipment
Ex : Symbol for equipment designed for potentially explosive atmospheres
e : Protection type
IIC : Explosion group
T3 or T4 : Temperature class
Gb : EPL “Gas” level
Ex tb : Protection type in “dust” atmospheres (optional)
IIIC T 125°C : “Dust” group and maximum surface temperature (optional)
Db : EPL “Dust” level
0080 : INERIS notied Body
INERIS 01ATEX0010 X : EC type-examination certicate number
DE:
NDE: g. / h.
3 LSE132 M T
N° 0123456J11 001
2011 IP65 IK08
40 °C Ins. cl. F S1 1000m 93kg
0080
IEC 60034-1
V Hz min-1 kW cos ϕA
A H
230
400
460
50
50
60
1460
1460
1765
7,50
7,50
7,50
0,83
0,83
0,81
25,40
14,70
12,85
INERIS 01ATEX0010X
II 2 GD Ex e IIC T3 Gb Ex tb IIIC T125°C Db
ID/IN=7.9 tE=5.5s ; CTP150°C
F - 16015 ANGOULEME
DE:
NDE: g. / h.
3 LSE132 M T
N°0123456J11 001
2011 IP55 IK08
40 °C Ins. cl. F S1 1000m 93kg
0080
IEC 60034-1
V Hz min-1 kW cos ϕA
A H
230
400
460
50
50
60
1460
1460
1765
7,50
7,50
7,50
0,83
0,83
0,81
25,40
14,70
12,85
INERIS 01ATEX0010X
II 2 G Ex e IIC T3 Gb
ID/IN=7.9 tE=5.5s
F - 16015 ANGOULEME
Motor
MOT 3 ~ : Three-phase A.C. motor
LSE : LSE series
132 : Frame size
M : Frame size
Motor no.
No. : Serial number
L-M* : Year of production
F-A** : Month of production
040-001 : Batch number
* L = 2000, M = 2001 ... W = 2009, X = 2010
**A = January, F = June
kg : Weight
IP 55 or 65: Protection index
IK08 : Shock resistance index
I cl.F : Insulation class F
40°C : Maximum ambient operating
temperature
S1 : Duty
V : Supply voltage
Hz : Supply frequency
min-1 : Revolutions per minute (rpm)
kW : Rated output power
cos j : Power factor
A : Rated current
D : Connection symbol
ID/IN : Starting current
tE : Locked rotor time
Bearings
DE : Drive end
Drive end bearing
NDE : Non drive end
bearing
Legal mark of conformity of
product to the requirements of
European Directives.
Zone
ATEX
marking
Type marking
of “Gas” protection
Type marking
of “Dust” protection
(optional)
Index of
protection
ATEX 1&2 II 2 G EX e IIC T3 Gb
Ex e IIC T4 Gb / IP 55
ATEX 1 & 21
2 & 22 II 2 GD EX e IIC T3 Gb
Ex e IIC T4 Gb
Ex tb IIIC T125°C Db
Ex tb IIIC T125°C Db IP 65

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2 - STORAGE
Prior to commissioning, machines should be stored:
- Away from humidity: at relative humidity levels above 90%,
the machine insulation can drop very rapidly, to just above zero
at around 100%. The state of the anti-rust protection on
unpainted parts should be monitored.
For very long storage periods the motor can be placed in a
sealed enclosure (for example heat-shrunk plastic) containing
sachets of desiccant:
- Away from frequent signicant variations in temperature, to
avoid the risk of condensation. During storage the drain plugs
must be removed to allow condensation water to escape.
- If the area is subject to vibration, try to reduce the effect of this
vibration by placing the motor on a damping support (rubber
plate or similar) and turn the rotor a fraction of a turn once a
fortnight to prevent the bearing rings from becoming marked.
Remove and replace the rotor locking device if applicable.
- Do not remove the rotor locking device (where there are roller
bearings).
Even if the motor has been stored in the correct conditions,
certain checks must be carried out before it is started up:
Greasing
The motors must be stored in their original packaging, in a
location away from humidity (RH<90%) and vibrations.
- Motors tted with permanently greased bearings: maximum
storage period = 3 years; after this time, replace the bearings
with an identical type.
- Motors tted with grease nipples:
Storage period
Grade
2 grease
Grade
3 grease
< 6 months < 1 year No regreasing before commissioning.
6 months
to 1 year
1 to 2
years
Regrease before commissioning in accordance with
the instructions appearing on the nameplate
(quantity and quality of grease).
1 to 5
years
2 to 5
years
Dismantle and clean the bearings. Completely
replace the grease in accordance with the
instructions appearing on the nameplate (quantity
and quality of grease). Replace the seals on the
shaftways and for IP 66 motors on the spigots before
commissioning.
> 5 years > 5 years Change the bearings. Completely replace the
grease in accordance with the instructions appearing
on the nameplate (quantity and quality of grease).
Replace the seals on the shaftways (lubricate them
using the same grease as that on the bearings) and
for IP 66 motors on the spigots before
commissioning.
3 - COMMISSIONING
This check is essential if the motor has been stored for longer
than 6 months or if it has been kept in a damp atmosphere.
This measurement must be carried out using a megohmmeter
at 500 V D.C. (do not use a magnetoelectric system).
It is better to carry out an initial test at 30 or 50 volts and if the
insulation is greater than 1 megohm, carry out a second test
at 500 volts for 60 seconds. The insulation value must be at
least 10 megohms in cold state.
If this value cannot be achieved, or if the motor may have been
splashed with water or salt spray, or kept for a long period in a
very humid place or if it is covered with condensation, it is
advisable to dry the stator for 24 hours in a drying oven at a
temperature of between 110°C and 120°C.
If it is not possible to place the motor in a drying oven:
- Switch on the motor, with the rotor locked, at 3-phase A.C.
voltage reduced to approximately 10% of the rated voltage, for
12 hours (use an induction regulator or a reduction transformer
with adjustable outlets).
- Or supply the 3 phases in series with a D.C. current, with the
voltage at 1 to 2% of the rated voltage (use a D.C. generator
with independent excitation or batteries for motors of less than
22 kW).
- NB: The A.C. current must be monitored using a clamp
ammeter, and the D.C. current using a shunt ammeter. This
current must not exceed 60% of the rated current.
It is advisable to place a thermometer on the motor housing: if
the temperature exceeds 70°C, reduce the indicated voltage
or current by 5% of the original value for every 10°C difference.
While it is drying, all the motor orices must be open (terminal
box, drain holes). Before commissioning, all these covers must
be replaced so that the motor conforms to IP 55 or 65 degree
of protection. Clean or replace the orices and plugs or
breathers before reassembly.
Before starting the motor, it is advisable to
check the insulation between the phases and
earth, and between phases.
M
Warning: If the high voltage test, carried out at
the factory before despatch, needs to be
repeated, it should be performed at half the
standard voltage, ie: 1/2 (2 U + 1000 V). Check that the
capacitive effect resulting from the high voltage test
is eliminated before connecting the terminals to earth.
Prior to commissioning for all motors:
- Remove all dust from the machine
- Rotate the motor with no load (no mechanical
load) for 2 to 5 minutes, checking that there is no
abnormal noise. If there is any abnormal noise, see
section 10.
Warning: Do not perform a high voltage test on
the auxiliaries.
Should the machine need to be repainted, the
coating must not be more than 2 mm thick and 0.2 mm
thick for equipment in group IIC. If not, it must be
antistatic.

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4 - INSTALLATION
4.1 - Position of lifting rings
Labour regulations stipulate that all loads over 25 kg must be
tted with lifting devices to facilitate handling.
The positions of the lifting rings and the minimum dimensions
of the loading bars are given below in order to help with
preparation for handling the motors. If these precautions are
not followed, there is a risk of warping or crushing some
equipment such as the terminal box, protective cover or drip
cover.
• Horizontal position
Type Horizontal position
A e min. h min. Øt
100 120 200 150 9
112 120 200 150 9
132 160 200 150 9
160 200 160 110 14
180 MR 200 160 110 14
180 L 200 260 150 14
200 270 260 165 14
225 ST/MT/MR 270 260 250 14
250 MZ 270 260 250 14
250 ME 400 400 500 30
280 SC/MC 400 400 500 30
• Vertical position
Type Vertical position
C E D n ØS e min.* h min.
160 320 200 230 2 14 320 350
180 MR 320 200 230 2 14 320 270
180 L 390 265 290 2 14 390 320
200 410 300 295 2 14 410 450
225 ST/MT/MR 410 300 295 2 14 410 450
250 MZ 410 300 295 2 14 410 450
250 ME 500 400 502 2 30 500 500
280 SC/MC 500 400 502 2 30 500 500
* if the motor is tted with a drip cover, allow an additional 50 to 100 mm
to avoid damaging it when the load is swung.
4.2 - Location - Ventilation
Our motors are cooled in accordance with method IC 411
(standard IEC 60034-6), ie. “machine cooled by the surface,
using the ambient uid (air) owing along the machine”.
The fan at the non drive end cools the motor. Air is sucked in
through the grille of a fan cover (which provides protection
against the risk of direct contact with the fan in accordance
with standard IEC 60034-5) and blown along the housing ns
to ensure thermal equilibrium of the motor whatever the
direction of rotation.
The lifting rings are intended for lifting the
motor on its own. They must not be used to lift
the whole machine once the motor has been
tted to it.
e
A
h
2 x Øt
Motors intended for use in the vertical position
may be delivered in the horizontal position on a
pallet. When the motor is pivoted, the shaft must
under no circumstances be allowed to touch the
ground, as the bearings may be irreparably damaged.
e
h
n x ØS
D
E
C
View from above View from the side
1/4 H min
H
1/4 H min
H

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The motor must be installed in an adequately ventilated area,
with clearance for the air intake and outlet of at least one-
quarter of the frame size.
Blocking the fan cover grille and the housing ns, even
accidentally (clogging), is likely to adversely affect the operation
and safety of the motor.
In the case of vertical operation with the shaft extension facing
down, it is advisable to t the motor with a drip cover to prevent
the entry of any foreign bodies.
It is necessary to check that the hot air is not being recycled. If
it is, pipes must be provided for the intake of cold air and
discharge of hot air, in order to prevent abnormal temperature
rise of the motor.
In this case, if the air is not circulated by an auxiliary fan, the
dimensions of the pipes must be such that the load losses are
negligible compared to those of the motor.
Positioning
The motor must be mounted in the position specied on
the order, on a base which is rigid enough to prevent
distortion and vibration.
Where the motor feet have six xing holes, it is preferable to
use those which correspond to the standard dimensions for the
motor power rating (refer to the technical catalogue for
induction motors) or, failing that, to those shown at B2.
Provide easy access to the terminal box, the condensation
drain plugs and, if appropriate, to the grease nipples.
Use lifting equipment which is compatible with the weight of the
motor (indicated on the nameplate).
4.3 - Coupling
Preparation
Turn the motor by hand before coupling to detect any possible
fault due to handling.
Remove any protection from the shaft extension. Drain off any
condensation water which may have formed inside the motor
(see section 3 page 6).
Rotor locking device
For made-to-order motors with roller bearings, remove the
rotor locking device.
In exceptional circumstances when the motor has to be moved
after the coupling device has been tted, the rotor must be re-
immobilised.
Balancing
Rotating machines are balanced according to standard
IEC 60034-14:
- Half-key when the shaft extension is marked H.
By special request, the balancing can be set:
- No key when the shaft extension is marked N
- Full key when the shaft extension is marked F
Any coupling element (pulley, coupling sleeve, slip-ring, etc)
must therefore be balanced accordingly.
Motor with 2 shaft extensions:
If the second shaft extension is not used, in order to
comply with the balancing class, the half-key or key must
be xed rmly in the keyway so that it is not thrown out
during rotation (H or F balancing) and must be protected
against direct contact.
B
2
B
1
When the motor is tted with lifting rings, they
are for lifting the motor on its own and must not
be used to lift the whole machine after the motor
has been tted to it.
Note 1: When installing a suspended motor, it is
essential to provide protection in case the xing
breaks.
Note 2: Never stand on the motor.

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5 - ELECTRICAL PARAMETERS LIMIT
VALUES
5.1 - Minimizing motor starting problems
In order to protect the installation, any signicant temperature
rise in the cabling conduits must be prevented, while ensuring
that the protection devices are not triggered during starting.
Problems affecting the operation of other devices connected to
the same source are due to the voltage drop caused by the
current inrush on starting.
Even though mains supplies increasingly allow D.O.L. starting,
the current inrush must be reduced for certain installations.
Jolt-free operation and soft starting ensure greater ease of use
and an increased lifespan for the machines being driven.
The two essential parameters for starting cage induction
motors are:
- Starting torque
- Starting current
The starting torque and the resistive torque determine the
starting time.
Depending on the load being driven, it may be necessary to
adapt the torque and the current to the machine starting time
and to the possibilities of the mains power supply.
The ve essential modes are:
- D.O.L. starting
- Star/delta starting
- Soft starting with autotransformer
- Soft starting with resistors
- Electronic starting
The "electronic" starting modes control the voltage at the motor
terminals during the entire starting phase and enable very soft,
jolt-free starting.
Starting systems must be placed outside the potentially
explosive zone or be of an approved type.
5.2 - Supply voltage
The rated voltage is indicated on the nameplate.
5.3 - Starting time
The starting times must remain within the limits shown below
on condition that the number of starts per hour is 6 or less.
Three successive cold starts and two consecutive warm starts
are allowed.
Permissible motor starting time as a function of the ratio ID/IN.
5.4 - Locked rotor time tE
tE is the maximum locked rotor time permitted to conform to the
rated temperature class. The tE value is indicated on the motor
nameplate.
Protection devices must be placed outside the potentially
explosive zone or be of an approved type.
5.5 - Supply by frequency inverter
(See section 7.1)
25
20
15
Time (s)
10
5567Id/In 8 9 10
Warm startCold start
If the rotor locks, a protective device should switch off
the power supply in a time less than tE.

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6 - USE
Thermal protection (see section 8) and space heaters.
Type Operating principle Operating curve Breaking capacity
(A) Protection provided Mounting Number of devices*
Thermistor with positive
temperature coefcient PTC
Non-linear variable resistor,
indirectly heated
R
TNF
T
R
TNF
T
0General surveillance
for transient overloads
Mounted with associated relay in
control circuit
3 in series
Thermocouples
T (T<150°C)
Copper Constantan
K (T<1000°C)
Copper-nickel
Peltier effect
V
T
V
T
0Continuous surveillance at hot
spots at regular intervals
Mounted in control boards with
associated reading equipment (or
recorder)
1 per hot spot
Platinum resistance
thermometer
PT 100
Variable linear resistance to
indirect heating
R
T
R
T
0High accuracy continuous
surveillance at key hot spots
Mounted in control boards with
associated reading equipment (or
recorder)
1 per hot spot
- NRT: nominal running temperature.
- The NRTs are chosen according to the position of the sensor in the motor and the temperature rise class.
* The number of devices relates to the winding protection.
Alarm and early warning
All protective equipment can be backed up by another type of
protection (with different NRTs): the rst device will then act as
an early warning (light or sound signals given without shutting
down the power circuits), and the second device will be the
alarm (shutting down the power circuits).
Protection against condensation: space heaters
Identication: 1 red label
A glass bre exible resistor is xed on 1 or 2 coil end turns.
This resistor heats the machines when stopped and thus
prevents condensation inside the machines. The space
heaters must be switched off when the machine is in use.
Power supply: 230 V single-phase unless otherwise specied
by the customer.
The drain plugs underneath the motor must be opened
approximately every 6 months. They must be replaced with
new seals to ensure IP 55 or IP 65 protection of the motor.
Thermal magnetic protection
The motors must be protected by a thermal magnetic device
located between the isolating switch and the motor. These
protection devices provide total protection of the motor against
non-transient overloads.
This device can be accompanied by fused circuit-breakers.
Built-in indirect thermal protection
The motors can be equipped with optional heat sensors. These
sensors can be used to monitor temperature changes at “hot
spots”:
- Overload detection
- Cooling check
- Monitoring strategic points for maintenance of the installation
- Ensuring the temperature of the hot spots is monitored.
So that the maximum surface temperature is never
reached, the internal thermal sensors with the material,
when they are obligatory, must be connected to a device
(in additional to and functionally independent of any
system which could be required for operational reasons
in normal conditions), which switches off the motor.
Temperature sensor operating thresholds:
- Maximum surface temperature: 125°C (GD)
• winding sensor: 120°C ± 5°C
• DE shield sensor: 120°C ± 5°C
- Maximum surface temperature: 130°C (class T4)
• winding sensor: 120°C ± 5°C
• DE shield sensor: 120°C ± 5°C
- Maximum surface temperature: 195°C (class T3)
• winding sensor: 150°C ± 6°C
• DE shield sensor: 120°C ± 5°C
Under no circumstances can these sensors be
used for direct control of the motor operating cycles.
Control and breaking devices must be installed in
cabinets placed outside the danger zone or must be of
an approved type.

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7 - SPECIAL OPERATING
CONDITIONS
- Thermal protection (see sections 6 & 8)
- Space heaters (see section 6)
- Temperatures: storage and ambient
Note: Ta = ambient temperature
If the motor has been stored at a temperature lower than -10°C,
heat it (see section 3) and turn the shaft manually before
starting up the machine.
If it is to be used at a temperature lower than - 20°C, the motor
may be equipped with space heaters.
Our standard motors are designed to operate at an ambient
temperature Ta of between -20°C and 40°C.
If Ta < -25°C, the shaftway seals must be made of silicon and
the fan must be metal. The at seals of the terminal box must
be silicon.
- Surface temperature
As standard, the maximum surface temperature of our motors
is 200°C for T3 or 135°C for T4 with an ambient temperature of
≤ 40°C (G).
If the motors are also to be used in atmospheres which may
contain explosive dust, the maximum surface temperature will
be 125°C (GD).
- Installation zones
Motors with IP 65 protection are designed for use in
atmospheres containing explosive dust IIIC (zone 21).
In atmospheres containing explosive gas, the degree of
protection is IP 55.
- Connection
Particular attention must be paid to the information on the
nameplate in order to choose the correct type of connection for
the supply voltage.
- Earthing
It is compulsory to earth the motor, and earthing must be
performed in accordance with current regulations (protection
of workers).
- Seals
If the drain plugs or breathers are removed, they must be
replaced in order to ensure that the motor conforms to IP 55 or
IP 65 protection. Replace the seals which have been removed
with new seals of the same type. Clean the holes and plugs
before reassembly.
Each time the motor is dismantled, and during planned
maintenance, replace the seals on the shaftways, the shield
spigots and the terminal box cover with new seals of the same
type after cleaning all parts. The seals on the shaftways must
be tted using the same type of grease as on the bearings.
- Workforce safety
Protect all rotating devices before power-up.
If a motor is started up without a coupling device having been
tted, carefully immobilise the key in its location.
All measures must be taken to ensure protection against the
risks which arise when there are rotating parts (coupling
sleeve, pulley, belt, etc).
Beware of backdriving when the motor is switched off. The
appropriate precautions must be taken:
- For example, for pumps a non-return valve must be installed.
- LEROY-SOMER "Digistart" electronic starter
This is a multi-function electronic system with a microcontroller,
which is used with all 3-phase cage induction motors.
It provides soft starting of the motor with:
- Reduction of the starting current
- Gradual, jolt-free acceleration, achieved by controlling the
current absorbed by the motor.
After starting, the DIGISTART performs additional motor
control functions in its other operating phases: steady state
and deceleration.
- 18 to 1600 A models
- Supply: 220 to 700 V - 50/60 Hz
DIGISTART is economical to install, as a fused switch is the
only additional device needed.
The "Digistart" electronic starter used with the motor
must be installed outside danger zones.
- Contactors - Isolators
In all cases, contactors, isolators, etc, must be installed
and connected in an enclosure outside the danger zone or
be of an approved type.
- Shock resistance
The motor can withstand a weak mechanical shock (IK 08
according to EN 50102). The user must provide additional
protection if there is a high risk of mechanical shock.

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7.1 - Use with a variable speed drive
When a drive is used, any special instructions detailed in the
specic drive manual must be observed. In particular, the
following minimum steps must be taken:
- Check that the drive switching frequency is at least 3 kHz.
- Check that the motor has a second nameplate indicating the
maximum motor characteristics when used with a variable
speed drive.
- The reference voltage, usually 400 V at 50 Hz, is indicated on
the motor nameplate. The drive must deliver a constant
voltage/frequency signal to the motor.
- Program in the drive the maximum current value and also the
min. and max. frequency values indicated on the second motor
nameplate.
- Each type of "e" motor should have been tested rst on load
with a drive of exactly the same type as the one it will be
controlled with.
7.1.1 - Special conditions for safe operation
- As standard, the motor shock resistance corresponds to a
“low” risk of mechanical danger, and they should therefore be
installed in an environment with a low risk of shocks.
- The motor must be tted with thermal sensors in the winding
(all frame sizes) and on the DE bearing (frame size 160 and
above) in the following cases:
- Motor supplied by a frequency inverter
- Motor in a good air-ow (IC418) and not self-cooled
- Motor adapted so as to no longer be self-cooled (IC410)
- Motor tted with a backstop.
So that the maximum surface temperature is never
reached, the internal thermal sensors with the material,
when they are obligatory, must be connected to a device
(in additional to and functionally independent of any
system which could be required for operational reasons
in normal conditions), which switches off the motor.
- When the motor is tted with auxiliary or forced ventilation
(IC416), a device must be present to prevent the main motor
from operating when there is no ventilation.
- The space heaters should only be supplied with power when
the motor is switched off and cold; their use is recommended
in ambient temperatures less than -20°C.
- The supply voltage and frequency must conform to those
indicated on the motor nameplate.
- The frequency range specied on the motor nameplate must
be strictly observed.
- When several motors are supplied by the same drive,
individual protection must be provided on each motor starter
(thermal relay for example), for safety reasons.
- When a frequency inverter is used, any special instructions
detailed in its specic manual must be complied with.
- The cable glands should be compatible with the protection
method used for the connection part. On variants with an
integral cable(s), the motor must be connected outside the
potentially explosive atmosphere, or inside a box protected by
a suitable recognised protection method.
- When the motor is tted with one or more auxiliary junction
boxes protected with increased safety, it can only tolerate a low
risk of mechanical danger, and the user will need to provide
additional protection if there is a high level of risk. (In other
words, when an auxiliary terminal box is attached to the main
terminal box).
Drives and sensor connection devices must be
placed outside danger zones (outside zones 0,
1, 2, 20, 21 and 22).

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8 - MECHANICAL ADJUSTMENTS
Tolerances and adjustments
The standard tolerances are applicable to the mechanical
characteristics given in our catalogues. They comply fully with
the requirements of IEC standard 60072-1.
- Users must adhere strictly to the instructions provided by the
transmission device supplier.
- Avoid impacts which could damage the bearings.
Use a spanner and the tapped hole of the shaft extension with
a special lubricant (e.g. molykote grease) to make it easier to
t the coupling.
The hub of the transmission device must be:
- Fully in contact with the shoulder of the shaft or, if this is
missing, against the metal stop ring which forms a labyrinth
seal and thus locks the bearing in place (do not crush the seal).
- Longer than the shaft extension (2 to 3 mm) so that it can be
tightened using a screw and washer. If it is not, a spacer ring
must be inserted without cutting the key (if this ring is large, it
must be balanced).
If there is a second shaft extension, it must only be used for
direct coupling and the same recommendations must be
followed.
Inertia ywheels must not be mounted directly onto the shaft
extension, but installed between end shields and connected by
a coupling device.
Direct connection onto the machine
When mounted directly on the motor shaft extension of the
moving device (pump or fan turbine), check that this device is
perfectly balanced and that the radial force and the axial thrust
are within the limits indicated in the catalogue for bearing
performance.
Direct connection using a exible coupling
Selection of the coupling sleeve should take account of the
rated torque to be transmitted and the safety factor dependent
on the starting conditions for the electric motor.
The machines must be carefully aligned, so that any lack of
concentricity and parallelism in the two parts of the coupling
sleeve is compatible with the recommendations of the coupling
sleeve manufacturer.
The two parts of the coupling sleeve must be assembled
provisionally to assist their movement in relation to one another.
Adjust the parallel plane of both shafts using a gauge. Measure
the distance between the two coupling surfaces at one point on
the circumference. Rotate them 90°, 180° and 270° in relation
to this initial position, and measure each time. The difference
between the two extreme values of dimension “x” must not
exceed 0.05 mm for standard couplings.
To perfect this adjustment and at the same time check the
concentricity of the two shafts, t 2 gauges as shown in the
diagram and slowly turn both shafts.
The differences registered by either shaft will indicate the need
for an axial or radial adjustment if the difference exceeds
0.05 mm.
Direct connection using a rigid coupling
The two shafts must be aligned so as to adhere to the tolerances
of the coupling sleeve manufacturer.
Maintain the minimum distance between the two shaft
extensions to allow for expansion of the motor shaft and the
load shaft.
Resting
on shoulder of the shaft
Resting
on stop ring
The 2nd shaft extension may also be smaller
than the main shaft extension, and under no
circumstances can it deliver torques greater
than half the rated torque.
x
A
Ø
Ø (mm) A (mm)
min.
9 to 55 1
60 1.5
65 1.5
75 2
80 2

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Transmission via belt pulleys
The user can choose the diameter of the pulleys.
Cast iron pulleys with a diameter over 315 are not
recommended for rotation speeds of 3000 min-1.
Flat belts cannot be used for rotation speeds of 3000 min-1 or
more.
Positioning the belts
So that the belts can be correctly positioned, allow for possible
adjustment of approximately 3% with respect to the calculated
distance E.
Force must never be used when tting the belts.
For notched belts, position the notches in the pulley grooves.
Aligning the pulleys
Check that the motor shaft is totally parallel to that of the
receiving pulley.
Reminder:
- Too much tension = unnecessary force on the end shields
which could lead to an abnormal temperature, premature wear
of the bearing unit (end shield-bearings), and eventually break
the shaft.
- Too little tension = vibration (wearing of the bearing unit).
Fixed distance between centres:
Place a belt tensioning pulley on the slack side of the belts:
- Smooth pulley on the outside of the belt
- Grooved pulley on the inside of the belts when using V-belts
Adjustable distance between centres:
The motor is usually mounted on slide rails, which enables
optimum adjustment of the pulley alignment and the belt
tension.
Place the slide rails on a completely horizontal baseplate.
The lengthways position of the slide rails is determined by the
length of the belt, and the crossways position by the pulley of
the machine being driven.
Mount the slide rails rmly with the tension screws in the
direction shown in the diagram (slide rail screw on the belt side
between the motor and the machine being driven).
Fix the slide rails onto the baseplate and adjust the belt tension
as before.
Thermal protection
On-line protection
Setting the thermal protection (see section 6)
This should be adjusted to the value of the current read on the
motor nameplate for the connected mains voltage and
frequency.
With a belt/pulley assembly, check that the
motor can cope with radial loads.
The belts must be antistatic and ame-resistant.
E
Protect all rotating devices before power-up.
Adjusting the tension of the belts
The tension of the belts must be adjusted very
carefully in accordance with the recommendations
of the belt supplier and the calculations made when the
product was specied.
Tension screw
Tension screw

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9 - SUPPLY CONNECTION
9.1 - Terminal box
This is placed as standard on the top of the motor near the drive
end. It has IP 55 (G) or IP 65 (GD) protection and is tted with
a cable gland according to the table below.
Warning: The position of the terminal box cannot be easily
modied, even with anged motors, as the condensation drain
holes (if appropriate) must be at the bottom.
Cable gland
If the thread(s) on the orice(s) designed to take one or more
cable glands or conduits is (are) metric, there will be no
particular marking on the motor; if the thread type is different or
mixed, the type(s) will be marked on the equipment.
The standard position of the cable gland (1) is on the right,
seen from the motor drive end.
Due to the symmetrical construction of the terminal box, it can
be placed in any of the four directions, except position 2 on
ange-mounted motors (B5), apart from on 355 LK - 400 - 500.
A cable gland must never open upwards.
Check that the incoming bend radius of the cables prevents
water entering via the cable gland.
The installer is responsible for the IP sealing
of the cable path (see the motor nameplate and
the instructions for assembling the cable
gland) .
All accessoiries must be of a type approved or
certied by the group, the application (gas and/or
dust) and the temperature class correspond at
minimum to those for the device location.
Terminal box positions Cable gland positions
A
Standard
position
24
1
3
Standard
position
Cable size
Adapt the cable gland and its reducer or amplier,
if tted, to the diameter of the cable being used, in
accordance with the manual specic to the cable
gland.
To maintain the original stated IP protection of the
motor, it is essential to make a watertight seal between
the rubber ring and the cable, by tightening the cable
gland correctly (it should not be possible to unscrew
it without a tool).
Unused cable glands must be replaced with threaded
plugs.
Unused orices must also be closed off using
threaded plugs. When tting cable glands or blocking
holes, a seal of perbunan, or silicon or polyurethane
mastic, must be inserted between the cable glands,
the plugs, the reducers or (and) the ampliers and the
support or the terminal box.
For connections using screwed conduit entries, the
thread seal can be reinforced with grease. These
threads must be rendered watertight by using
polyurethane or silicon mastic, or anti-vibration
adhesive.

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9.2 - Wiring diagram for terminal block
or isolators
All motors are supplied with a wiring diagram in the terminal
box. If required, this diagram should be obtained from the
supplier, specifying the motor type and number (shown on the
motor nameplate).
The connector links required for coupling can be found inside
the terminal box.
Single speed motors have a block with 6 Exe approved safety
terminals, whose marking complies with IEC 60034-8
(or NFC 51-118).
9.3 - Direction of rotation
When the motor is powered by U1, V1, W1 or 1U, 1V, 1W from
a direct mains supply L1, L2, L3, it turns clockwise when seen
from the drive shaft end.
If 2 phases of the power supply are changed over, the motor
will rotate anti-clockwise (the motor should be checked to
ensure that it has been designed to rotate in both directions).
If the motor is tted with accessories (thermal protection or
space heater), these must be connected on mini-terminals.
Motor tted with a terminal block
9.4 - Earth terminal
One earth terminal is located inside the terminal box, and
another is outside the enclosure. They are marked:
They must be protected against self-release by a jumper, lock
washer, screw or locknut, or anti-vibration adhesive.
The sizing of the cables must comply with the specications of
standard 60079-0.
“e” sensor
It is compulsory to earth the motor, and earthing
must be performed in accordance with current
regulations (protection of workers).
Under no circumstances should the power supply cable be used for handling the motor.
NE PAS OUVRIR SOUS TENSION
NE PAS OUVRIR SI UNE ATMOSPHERE
EXPLOSIVE PEUT ETRE PRESENTE
DO NOT OPEN WHEN ENERGIZED
DO NOT OPEN WHEN AN EXPLOSIVE
ATMOSPHERE MAY BE PRESENTE
AVERTISSEMENT
WARNING
ref. HS51A 31 PSI070EA050
The motors are factory-tted with guidance labels which must be kept clean and legible.

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9.5 - Connecting the power supply
cables to the terminal block
The cables must be tted with connectors suitable for the cable
cross-section and the terminal diameter (diagrams 1 and 3).
They must be crimped in accordance with the connector
supplier's instructions.
9.5.1 - Terminal block with round connectors
Ex e M5 and M6 (LSE/FLSE 80 to 160)
These terminal blocks, mounted on the housing and held in
place by 2 locked screws, make it possible to use standard
round connectors.
Each terminal consists of the following items, positioned in order:
- 1: motor cable connector, shank locked
- 2: power supply cable connector, shank locked
- 3: terminal washer
- 4: Y or D connector link
- 5: “Serpress” brake nut
Tightening torque (N.m) for the nuts on LSE terminal
blocks
Terminal M4 M5 M6
Steel 2 3.2 5
Brass 123
9.5.2 - Terminal block with slotted terminals
(LSE 180-280)
The motor winding connecting cable is attached to the
connector for a slotted terminal, either tinned brass KA type
(open shank) for soldering, or tinned copper QUCA type (open
shank) for crimping with a suitable tool.
The cable connecting the electrical mains supply is laid in the
terminal slot, under the connector, and tightened to the
recommended tightening torque, as are the connector and the
connector link, using the nut.
- 1: slotted terminal - 4: connector link
- 2: clamping nut - 5: winding connector
- 3: lock washer - 6: slot for power supply cable
Tightening torque (N.m) for the nuts on slotted terminal
blocks
Terminal KS7A KS8A KS10A KS14A KS18A
Steel 5 6 6 10 16
Max. connection cross-section on slotted terminal
blocks
Terminal KS7A KS8A KS10A KS14A KS18A
Solid or stranded cable mm22.5 4 6 10 -
Solid cable mm24 6 10 16 -
Max. current (solid cable) A 35 46 63 85 -
- Earth terminal:
This is situated inside the terminal box; in some cases, the
earth terminal may be situated on one of the feet or on one of
the cooling ns (round motors). It is indicated by the symbol:
* If required, ask the supplier for this diagram, specifying the
motor type and number (shown on the motor nameplate).
- Connecting the power supply cables to the terminal
block:
The cables must be tted with connectors suitable for the cable
cross-section and the terminal diameter.
They must be crimped in accordance with the connector
supplier's instructions.
Connection must be carried out with connector resting on
connector (see the diagrams below):
2 connectors
max. per
terminal
{
As a general rule, check that no nut, washer or
other foreign body has fallen into the terminal box
and/or come into contact with the winding.
It is compulsory to earth the motor, and earthing
must be performed in accordance with current
regulations (protection of workers).

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10 - MAINTENANCE
10.1 - General information
10.1.1 - Frequent monitoring
This monitoring, generally carried out by operators, is intended
to:
- Monitor, as a preventive measure, the state of the equipment
(cables, cable glands, etc) bearing in mind the environmental
conditions (temperature, humidity, etc).
- Detect as early as possible any potentially dangerous
problems, such as damage to the cable ducts by abrasion.
- Ensure that staff are fully trained on the risks and means of
prevention.
10.1.2 - Repairs
Repairs to and/or rewinding of the electrical equipment for use
in potentially explosive zones must be carried out by qualied
staff, using identical equipment, in compliance with the
specications of standard 60079-19. It is essential that the
motor is returned to its original state, adhering scrupulously to
the original motor construction. Disregarding this may affect
the safety of the equipment (for example, protection index not
conforming to IP 55 or IP 65) or the surface temperature (for
example, rewinding the motor). Service Centres (CDS) are
trained and approved by “Saqr - ATEX” to guarantee the
maintenance and repair of these motors in complete safety.
10.1.3 - Spare parts
When ordering spare parts, you must indicate the
complete motor type, its serial number and the information
given on the nameplate (see section 1).
Part numbers can be found on the exploded views and
their descriptions in the parts list (section 11).
Routine maintenance kits can be obtained from our After Sales
Service.
In the case of ange mounted motors, indicate the type of
ange and its dimensions (see below).
To ensure that our motors operate correctly and safely, it
is imperatif to use of original manufacturer spare parts.
In the event of failure to comply with this advice, the
manufacturer cannot be held responsible for any damage.
If there is an accumulation of dust between the
ns and/or on the fan cover grille, leading to a
rise in the surface temperature, the motor should be
cleaned frequently.
WARNING:
Modication is strictly prohibited without
the manufacturer’s approval in writing.
Service Centres (CDS) are trained and
approved by “Saqr - ATEX” to guarantee
the maintenance and repair of these
motors in complete safety.
M
n Ø S
n Ø S
LA T
N
P
J6
Flange mounted motor
Face mounted motor
T
N
P
J6
M

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10.2 - Corrective maintenance: general
information
10.2.1 - Dismantling the motor
- Open the terminal box, mark the wires and their positions
- Disconnect the power supply wires
- Uncouple the motor from the equipment being driven
Always use an extractor to remove any devices mounted on
the motor shaft extension.
10.2.2 - Checks before reassembly
Stator:
- Remove all dust from the stator: if the winding needs to be
cleaned, a suitable liquid must be used: dielectric and inert on
the insulating components and the external nish.
- Check the insulation (see section 3) and if necessary, dry it in
an oven.
- Clean the spigots thoroughly, and remove all traces of knocks
and mastic sealant on the mating surfaces if necessary.
Rotor:
- Clean and check the bearing running surfaces. If they are
damaged, renew the running surfaces or change the rotor.
- Check the condition of the threads, keys and their housings.
End shields:
- Clean off any traces of dirt (old grease, accumulated dust,
mastic sealant, etc).
- Clean the bearing housings and the spigot.
- If necessary, apply some antiash varnish to the insides of the
end shields.
- Carefully clean the bearing retainers and the grease valves
(if these are tted on the motor).
10.2.3 - Mounting the bearings on the shaft
This operation is extremely important, as the slightest indentation
of a ball on the bearing tracks would cause noise and vibration.
Lightly lubricate the running surfaces of the shaft.
There are a number of ways of mounting the bearings correctly:
- Cold state: The bearings must be mounted without any
impact, using a spanner (do not use a hammer). The force
applied must not be transferred to the bearing track. You
should therefore use the internal cage for support (taking care
not to press on the seal shield for sealed bearings).
- Hot state: Heat the bearing to between 80 and 100°C: using a
bearing heater, in a drying cabinet, an oven or on a heating plate.
(A blowtorch or an oil bath must never be used).
After dismantling and reassembling a bearing, all the spaces
between the seals and labyrinth seals must be lled with
grease in order to prevent the entry of dust and the rusting of
machined parts.
10.2.4 - Reassembling the motor
Tie rod tightening torque
Type Rod/screw Ø
Tightening torque
N.m ± 5%
56 M4 2.5
63 M4 2.5
71 M4 2.5
80 M5 4
90 M5 4
100 M5 or M6 4
112 M5 or M6 4
132 M7 10
160 M8 18
180 MT/LR M8 18
180 L M10 25
200 M10 25
225 ST/MR M10 25
225 MK M12 44
250 M12 44
280 M12 44
315 M12 44
315 LK/355 M16 100
355 LK/400 M16 100
450 M16 100
Care must be taken to ensure that the stator is replaced in
its original position so that the stack of laminations is centred
correctly (generally with the terminal box facing forward) and
the water drain holes are positioned correctly if they are on the
housing.
Tightening the tie rods
These must be tightened diagonally, to the torque indicated
(see above).
CAUTION:
Corrective maintenance can only be
performed by a Service Centre that has
been trained and approved in the repair
of ATEX products.
First switch off and lock the power supply and
ensure there is no potentially explosive
atmosphere.
Replace the seals on the shaftways and on the
shield spigots with new seals of the same type,
after cleaning the parts. The seals on the shaftways
must be tted using the same type of grease as on
the bearings.
1 4
3 2

LEROY-SOMER
20
2012.03 / d
INSTALLATION AND MAINTENANCE
LSE - FLSE
T
hree-phase induction motors for atmospheres containing explosive gases and dust
3614 en -
10.2.5 - Reassembling the terminal box
Reconnect all the power supply wires in accordance with the
diagram or the markings made before dismantling, and check
that the seals are correctly positioned before closing. Check
that the terminal box components are tightened correctly.
Note: It is advisable to test the motor at no load.
- If necessary, repaint the motor.
- Mount the transmission device on the motor shaft extension
and reinstall the motor on the machine to be driven (see
section 4.3).
10.3 - Safety regulations
10.4 - Routine maintenance
Inspection after commissioning
After approximately 50 hours’ operation, check the tightness of
the screws xing the motor and the coupling device. In the case
of chain or belt transmission, check that the tension is correctly
adjusted.
Cleaning
To ensure the motor operates correctly, remove any dust or
foreign bodies which may clog the air intake and the housing
ns.
Precaution: Check that the motor is completely sealed (terminal
box, drain holes, etc) before carrying out any cleaning operation.
Dry cleaning (vacuuming or compressed air) is always
preferable to wet cleaning.
When cleaning the motor, be careful to avoid any built-up of
static.
Draining condensation water
Variations in temperature cause condensation to form inside
the motor. This must be removed before it affects the operation
of the motor.
Condensation drain holes, located at the bottom of the motors
(bearing in mind their operating position) are sealed with plugs
or breathers which must be removed and then replaced every
six months.
Note: If there is high humidity and signicant variations in
temperature, or a prolonged stoppage, a shorter period is
recommended.
10.4.1 - Lubrication
10.4.1.1 - Grease life
The lifetime of a lubricating grease depends on:
- the characteristics of the grease (type of soap and base oil,
etc),
- service stress (type and size of bearing, speed of rotation,
operating temperature, etc),
- contamination.
10.4.1.2 - Permanently greased bearings
For motors from 80 to 132 frame size, the type and size of the
bearings make for long grease life and therefore lubrication for
the lifetime of the machine. The grease life L10h as a function of
speed of rotation and ambient temperature is shown on the
chart below.
Grease life L10h in 000s of hours, for frames sizes < 132
10
0
20
30
40
50
60
T amb (°C)
3010 20
N = 750 min -1
N = 1500 min -1
N = 1000 min -1
5 15 25
N = 3000 min -1
Life L10h in 000's of hours
10.4.1.3 - Bearings with grease nipples
The chart below shows the regreasing intervals, depending on
the type of motor, for standard bearing assemblies of frame
size ≥ 160 tted with grease nipples, operating at an ambient
temperature of 40°C on a horizontal shaft machine.
Before any work is carried out on the motor or in
the cabinet, ensure that there is no potentially
explosive atmosphere and that all the components of
the equipment are powered down.
Before any work is carried out on the motor or in
the cabinet, check that the cosine j compensation
capacitors are isolated and/or discharged (read the
voltage at the terminals).
Before any work is carried out in the terminal
box or in the cabinet, check that the space
heaters are switched off.
Depending on the type of thermal protection,
the motor may remain powered up. Ensure that
the mains supply is disconnected before any work is
carried out in the terminal box or in the cabinet.
Cleaning must always be carried out at a
pressure of less than 10 bars, from the centre of
the motor outwards to avoid dust and particles getting
under the seals.
Replace the drain hole covers to ensure IP55 or
IP65 protection of the motor. Replace the seals
which have been removed with new seals of the same
type. Clean the orices and plugs or breathers before
reassembling them.